Question

How many moles of sodium bicarbonate would be needed to react with all of the theoretical aspirin?

Answer 1

Answer:

• Assuming 325 mg of theoretical aspirin, 0.00180 moles of sodium bicarbonate would be needed to react with all of the theoretical aspirin.

Explanation:

The question is incomplete because the amount of theoretical aspirin is missing.

I can solve with a hypothetical amount of aspirin (acetylsalicylic acid).

The chemical formula of acetylsalysilic acid is C₉H₈O₄.

Assume 325mg of pure acetilsalysilic acid.

There is one carboxylic acid group in the molecule of acetylsalicylic acid.

Sodium bicarbonate is NaHCO₃.

Then, 1 mole of NaHCO₃ will react with 1 mole of C₉H₈O₄.

Hence, the mole ratio for the reaction between sodium bicarbonate, NaHCO₃, and aspiring, C₉H₈O₄, will be 1 : 1.

• NaHCO₃   +   C₉H₈O₄   →   NaC₉H₇O₄   +   H₂O   +   CO₂

Find the number of moles of C₉H₈O₄ in 325mg.

• The molar mass of C₉H₈O₄ is 180.158g/mol

• Number of moles = mass in grams / molar mass

• Mass in grams = 325mg × 1g / 1,000 mg = 0.325g

• Number of moles = 0.325g / 180.158g/mol = 0.00180 moles of C₉H₈O₄.

Then, as the theoretical mole ratio is 1 : 1, the same amount, 0.00180 moles of sodium bicarbonate, would be needed to react with all of the theoretical aspirin.